Figure 6From: Study on the visible-light-induced photokilling effect of nitrogen-doped TiO2 nanoparticles on cancer cells Micrograph of the micronuclei of the HeLa cells. Cultured with 50 μg/mL sample N-550-2 for 10 h and irradiated by a Xe lamp with a 400-nm longpass filter (12 mW/cm2) for 4 h. The micronuclei were observed.Back to article page